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Finding the Fourth Proportional to 69,149.80, 95,379.78 and 42,257.80

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Solution

The fourth proportional to 69,149.80, 95,379.78 and 42,257.80 is: 58,287.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,149.80 : 95,379.78 = 42,257.80 : x
  2. Step 2: Convert to fraction form
    69,149.80/95,379.78 = 42,257.80/x
  3. Step 3: Cross multiply
    69,149.80x = 95,379.78 × 42,257.80
  4. Step 4: Simplify right side
    69,149.80x = 4,030,539,667.28
  5. Step 5: Solve for x
    x = 4,030,539,667.28/69,149.80
  6. Step 6: Final answer
    x = 58,287.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.